I've talked to the author and sole maintainer about this video specifically, and he confirmed it is absolutely intentional and subtitle censoring is coming. He also confirmed that cutting out entire thirds out of videos is intentional, if the affected segment is also used to pitch a Nebula companion video (but otherwise just a continuation of the video). This happens on channels like Mustard and RealLifeLore. SponsorBlock isn't trying to eliminate annoyances, they're trying to turn existing videos into something something they're not - untainted by commercial interests. And they don't care if it takes away from the actual content of the video or removes tons of context.
The last straw for me was a Climate Town video about astroturfing that ends by introducing a petition to the EPA as "sponsored" by the grassroots organization that set it up. Someone cut 3 entire minutes out of that video to spite the supposed "sponsor" and took at least 2.5 minutes of content pertinent to the topic of the video with them. Sppnsorblock author also said that was intentional.
There is a setting to avoid skipping segments below X seconds if that's something you prefer. There is also an option to not skip anything if there is a full video sponsorship label, which probably will help in the scenario you are describing.
The Climate Town video is a sponsorship, and he clearly declares it as a sponsorship in the video, as I told you already on Twitter. Just because he says the word "grassroots" inside it doesn't make it not paid promotion.
The last straw for me was a Climate Town video about astroturfing that ends by introducing a petition to the EPA as "sponsored" by the grassroots organization that set it up. Someone cut 3 entire minutes out of that video to spite the supposed "sponsor" and took at least 2.5 minutes of content pertinent to the topic of the video with them. Sppnsorblock author also said that was intentional.